<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>向同个元素添加不同类型的事件</title>
</head>

<body>
    <p>实例使用 addEventListener() 方法在同一个按钮中添加多个事件。</p>
    <button id="myBtn">点我</button>
    <p id="demo"></p>
    <script>
        var x = document.getElementById("myBtn");
        x.addEventListener("mouseover", myFunction);
        x.addEventListener("click", mySecondFunction);
        x.addEventListener("mouseout", myThirdFunction);
        function myFunction() {
            document.getElementById("demo").innerHTML += "Moused over!<br>"
        }
        function mySecondFunction() {
            document.getElementById("demo").innerHTML += "Clicked!<br>"
        }
        function myThirdFunction() {
            document.getElementById("demo").innerHTML += "Moused out!<br>"
        }
    </script>
</body>

</html>